Home / 821,279.63-1,231,109.78-288,426.98

Finding the Fourth Proportional to 821,279.63, 1,231,109.78 and 288,426.98

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Solution

The fourth proportional to 821,279.63, 1,231,109.78 and 288,426.98 is: 432,356.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,279.63 : 1,231,109.78 = 288,426.98 : x
  2. Step 2: Convert to fraction form
    821,279.63/1,231,109.78 = 288,426.98/x
  3. Step 3: Cross multiply
    821,279.63x = 1,231,109.78 × 288,426.98
  4. Step 4: Simplify right side
    821,279.63x = 355,085,268,296.18
  5. Step 5: Solve for x
    x = 355,085,268,296.18/821,279.63
  6. Step 6: Final answer
    x = 432,356.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.